i'm jonathan betz, and here are the stories "al jazeera america" is following for you at this hour. a severe cold snap is gripping much of the nation. several deaths have been link to temperatures including the driver of an suv that lost control of a vehicle after sliding off a bridge in texas. major storm moving eastward expecting to bring messy conditions and airport delays from virginia to new england. increasing tensions in asia over disputed island in the east china sea. south korea is expands it's air defense zone. the move goes into effect on december 15th. people across south africa and the world are paying tribute to the legacy of nelson mandela.